Machine for making lasts.



E. J, PR'EDLE. MACHINE FOR MAXIM LASTS,

,APPLICATION FILED AUG. 14, 1G01.

E E. PRINDLE.- MACHINE FOR MAKING LASTS,

APPLICATION FILED AUG. 14, i901.

aented Aug. 5, 1913.

l0 SHEETS-*SHEET 2.

MAKING LASTS.

E FOR PPLCATlON FILED AUG. 14, 1991,

E J. PRINDLE. MACHINE ma mmm LASTS.

a Y r APPLICATION FILED AUG.14. 1901. L u 1 @@Qpfgg Patented Aug, 5,1&3.

10 SHEETS-SHEET 5.

E. J. PRINDLE.

MACHINE FOR MAKING LASTS. APPLICATION FILED AUG 14. 1901.

ggggyyg, Patente Aug. 5, 1913.

10 SHEETS-SHEET 6,

MACHINE EUR MAKNG LASTS,

AEPLIGATIOH FILED man, 1vol.

10 SHEETSFSE instep of the last. lever is pointed, and a scale is formedon the heel rest to 'indicate the position of the lever. An arm (Z7 ispivoted on the heel rest beneath the lever, and is engaged by a flatspring which co-acts with flat surfaces upon the arm to hold the armeither in a vertical position, where the rearward end of 'the lever is'elevated and thegage held out of contact with the last, or in aninclined posi tion, where the lever is free to move.

The slide d has a vertical apron d8 whose lower edge is guided in aguideway d on the bracket l). U on the apron are horizontal guides 1 inY'which is mounted a slide I. The latter slide is connected by a dle isswiveled to a yoke 3, to which a link- 4 is pivoted, the lower end ofthe link being pivoted to a treadle 5. An arm i projects' from the backplate B, and supports a pin which engages a slot in a levert that ispivoted on the apron d8. The forward end of thelever is provided 'with alug 8, which 'is adapted to rest upon the upper surface of an arm 9 onthe yoke and to prevent the rising of the yoke and routing tool exceptwhen such lug is opposite a slot 1 in the yoke when the latter is freeto rise and carry the routing tool. A lever 11 is pivoted on the` apronand has a slot which is engaged bya pin 12 that .is supported by an arm13, the latter being fastened to the table. The

upper end of the said lever carries a set screw which is adapted to bestruck by and to limit the forward movement of the slide I. The rearwardmovement of the said slide is limited by a set screw i on the apron cZS.

A lever 2' is pivoted on an arm z'l* projecting from the apron and oneend thereof 'is adapted to be acted upon by the upper flat surface of anarm il on the yoke. The opposite end ofthe lever is connected to a link19 whose upper end is pivoted to a rod z' which is mounted in a socketin a thrust arm 18. The rod 11 has a cross pin which projects throughslots in the thrust arm, and' which is normally held at the upper end ofsaid slots by a spring 20 interposed between the ends of such pin and aflange on the thrust arm. The thrust arm'passes through a bearing in theslide d, and is bent over to beer upon the upper surface of the last. Onthe slide e of the bracket E, a horizontal circular saw is mounted insuch position,

The rearward end of the and is of such thickness as to cut away thematerial of the lastV to formthe anvil heel seat as the last is movedpast such saw. On the slide f of the bracketF a circular saw f ismounted in a forwardly inclined position so as to form the sawpcut onthe forward face of the heel partof the last. On the slide g of thebracket G is mounted a vertical circular saw g in position to sever theheel part from the fore-part of the last' and form the vertical surfaceof the forepart. vA guide a extends along the tableA in front of the rowof brackets, and a seco-nd guide a is secured to the table perpendicularto the guide a at the left end thereof. Preferably, beyond the bracket Ga shaft L is mounted inhorizontal bearings on the table, and guides Zand Z are-secured to the v table perpendicularly to the said shaft. Asaw Z2 is mounted upon the shaft L, and such saw is provided with teethupon its outer periphery, having their cutting edges parallel to theshaft, and also with teeth projecting laterally from the face of thesaw, and having their cutting edges per pendicular to the said shaft. Alug Z3 vis formed on-a plate which is adjustably fas tened y,on theguide Z by a screw passing through a slot in the said plate. To the.right of the shaft L,'a'shaft M is mounted in bearings on the table,that are. slightly inlclined to. the horizontal, and such shaft carriesa circular saw m. A guide m perpendicular to the shaft is secured uponthe,

table. A clamp N is provided for holding the last. iThe frame of suchclamp consists ,of a, rectangular base, having sides rising verticallytherefrom, the sides being connected by a cross-piece at thetop. Thesides are provided with vertical guides, on which are mounted upper andloper heads n* and am, respectively that are provided with clamp jaws.The upper head is reciprocated by means of a hand screw, that isjournaled" therein. The lower head is adjusted vertically`by means of apair of wedges n whichl are received in inclined slots in the undersideof the lower head, that are connected` by a cross piecem?, and which areadjusted by means of a hand screw as that is journaled in a lug fastenedto the base, and is threaded intothe crossv piece n2. A lock nut n4 isthreaded on the screw n3. The upper holder a5 is pivoted between lugsthat are screwed to the upper head. Such holder is preferably curved'rearward and downwardand is provided with a V-shaped notch vthat isadapted to engage the comb of the last. A screw n is threaded into thega e and is adapted to bear upon a lug 'n.7 ormed 4in one of thebearings of the gage to limit the downward movement thereof. A-springn?coiled about a pin passing througlrears in thegag and eX- tending intothe bearings, has one end bearing position, is capable of resolution.into (l) a tilting movement longitudinally of the last,

which movement is permittedL by the connection between the jaw and theblock 71.22 consisting of the arc-shaped flanges 11,26 and the grooves11,28; (2) an axial movement, which movement is permitted by theswiveling of the block w22 to the slide n2, and (3) a movementtransversely of the last, which movement is permitted by the connectionbetween such slide and the head n* consistblocks n.34 and the head uw.

ing of the plates on the slides and the grooves on the head. During suchmovement of the said head thelower clamp jaw ns1 which is normallythrust out of its recess by the spring a is forced by contact with thelast back into the recess between the Further movement of the lower headcauses the spring plate n to come against the sole oi' the last,preferably the ball thereof. The final tightening of the screwlorces theupper surface' of the upper clamp jaw into firm contact with the undersurface of the block M2, thus locking such parts together, andpreventing the screw, the spring plate w33 is bent by the sole of thelest, causing the lower clamp jaw tobe impinged upon by and firmly heldbetween the arc-shaped seat in said head and the blocks n attached tosuch spring plate. The last has now been firmly clamped.

In the operation of my machine, the

! clamp jaws arc separated, the last is placed between them, and theclamp is placed in the angle between the guides a and a. The heel of thelast is'held firmly on the heel rest and in engagement with the forkedspring (Z4. The arm d? is drawn down to leave the bottom gage (ZB freeto come in Contact with the lower portion of the instep. The'wedges yn.and lff-are then adjusted until the lever d points to the marl; on itsscale which indicates that the instep is at the proper level tocorrectly position 'the cuts'in the fore-part and forward portion of theheelpart of the last. The-last is tipped laterally until it has theproper vertical position. The side gage n is then moved outward tocontact with the last by moving the wedge n downward, and is thenclamped by the thumb screw in the holder n. The hand screw of the clampis then turned, thus forcing the upper gage and the seat for the anvilheel sea-t of the last.

down upon the comb of the last, and bringing the comb and the rearportion of the heel in a line through the center of the clamp, andcausing the clamp jaws to firmly grasp the last. The scale plates forthe side gage and for the pointers' on the wedges are then adjusted, sothat the number corresponding to the length of the last is opposite themark on the wedge of the side gage pointer on the wedge n",respectively. These scales, now having been properly positioned for onesize of last, can be used to properly position the wedges n and the sidegage n for other lasts ofthe same proportions, by merely adjusting theside gage wedge and the pointer on the wedge n to numbers on the scaleplates corresponding to the length of the last. The bottom orv instepgage will thus be seen to be usedonly in positioning the wedgescorrectly for the first last of a series of lasts to be cut, and thewedges can then be afterward properly adjusted for the other lasts ofthe series, by the use of the now properlyadjusted scale plates. Thelast, being now iirmly and properly held in the clamp and the heel rest,the treadle is ing the routing tool to enter the last atthe forwardportion of the intended slot in the heel part. The hand lever is thendrawn forward, causing the routing tool to pass rearward, the level ofthe routingy tool being determined by the level of the lug 8 on thelevert'7 coming in contact with the upper surface of the arm is. on theyoke. The routing tool thus passes rearward until the depressed, causlugon said lever is opposite the slotor opening 1 in the said arm, when therouting tool can be forced upward by a further depressionof the treadle,thus causing the routing tool to bore the hole O for the jack pinsocket, and causing the countersink to countersink the lower endthereof. As the routingV tool rises, the lever 15 is moved by the arm ilto yieldingly bear down the thrust arm upon the upper side of the last,

to counteract the tendency 'of the routingtool to raise the last.- Atthe same time the routing tool is passing rearward, the drill H isforced through the last laterally to form the hole for the pin whichsecures the hinge in the last. The clamp is now moved to the right alongthe guide a past the saw e, and the latter cuts away the material A,asindicated by the lines o and oto form the The clamp, upon continuing themovement in the same direction, vcarries the last past the saw 7 and thesaw-cut 02 forming the beveled forward face of the heel part is4 made.Further movement of the clamp along the guide a causes the saw g tosever the now-completed heel part from the fore part as indicated by thelines o3. The clamp is then moved along the guide Z carrying the havingupper and' lower cylindrical surfaces concentric with a point above saidblock, the surfaces between which said Jaw moves being curved tocorrespond to said Jaw, and

means for forcing the last upon said block,l

base thereof, a concave cylindricali seat formed in said base, a jawmounted in said seat and having upper and ylower cylindrical surfacesconcentric with a point above said block, and ablock having a convexcylindrical surface adapted to bear upon the upper side of said jaw,said block being adapted to support a last.

11. A clamp forI a last consisting of a frame, aniupper clamping jaw,means on said frame for moving said jaw toward the base thereof, aconcave cylindrical seat formed in said base,a jaw mounted in said seatand having upper and lower cylindrical surfaces concentric with a pointabove said block, a block having a convex cylindrical surface adapted tobear 'upon the upper side y of said jaw, said block being adapted tosupport a last, and a spring tending to move said lower jaw toward theposition of the last.

l2. In a tool for making lasts, the combination of a frame, a clamp jawand means for forcing such jaw toward the last, said jaw having convexpoints or projections formed thereon by which it can adapt itself toAthe irregular surface of the last, 'said jaw being slidably mounted onsaid means for forci'.' g it toward the last to move in a directie i1transverse to the clamping movement, whereby the jaw can rst adaptitself to the last and thenbe clamped in adjusted position as it isforced against the last- 13. In a tool for making lasts, thecombinationof a clamp jaw so shaped as to contact with the last at aplurality of spaced points, and means for'forcing such` jaw toward theobject to be clamped, such jaw and said means having opposing surfaceswhich are disposed transversely to the direction of pressure of saidmeans, such surfaces being capable of being brought into irm contact bysaid means, and gages for positioning the last on its support soarranged as to be unaffected by the clamping action, said clamping meansaccommodating themsleves to and i clamping the last in the positiondetermined by said gages.

14. I n a tool for making lasts, the combination of a clamp jaw, a blockhaving a connection with said jaw can tilt, a slide torwhich said, blockis swiveled, a head on which such slide is mounted, and means forforcing such head by which the latter surfaces agreeing with toward Ytheobject -to be clamped, such jaw and block, said block and slide, andsuch slide and said head having opposing surfaces disposed transverselyto the line of pressure of suc-h forcing means, and said parts beingcapable of forcing such surfaces into firm contact with each other,Substanf tially als and for the purpose described.

15. In a tool for making lasts, the combi nation of a heel rest, a clampfor engaging phefore-.part of the last, guides for positionng the clampand heel rest relative to each other, whereby the last can rst beadjusted in the heel rest and clamp and then secured in the clamp, andwhereby the clamp can then be detached from the heel rest and used forpresenting the last to the cutters.

16. In a clamp forlasts, the combination of a frame, a support for thesole ofgthe last adjustably carried by said frame, a jaw above the last,said jaw being forked -at its' forward and rearward ends and having 'a'convex, upper surface, said forked `ends of said jaw being adapted toContact witha last, at. spaced points upon opposite sides of the comband toe portion, a block having a concave surface adapted to fit theupper I surface of said jaw, and means for forcingsaid block toward thelast.

17.` In a clamp for lasts, the combination of a frame, a support for thelast, upper and lower jaws having their surfaces most remote from thelast conveXly curved on the arcs of circles whose centers are betweenthe Jaws', said jaws having faces constructed and arranged to contactwith and hold a last, supports for said. jaws having concave and adaptedto engage said conveX surfaces, and means for forcing said jawstogether.

18'. In a clamp for lasts, the combination of a frame, asupport for thesole of the last, said support being formed in two''aparts, a slidewayformed between said parts and curved from a center above the support, acurved jaw seated in said slideway, and. means for forcingdhe last downupon'saiJL support.

19. In a clamp for lasts, the ,combination of a. frame; a support forthe sole of the last, a head movable up and down above 'the last., ablock transverselyslidable upon said head, a block swiveled to saidfirst-mentioned block, said last-mentioned block havin a concave lowersurface, an upper jaw forked at its forward and rearward endsand hav inga convex upper surface adapted tot said concave surface on saidlast-mentioned bloc means for loosely supporting said clamp Yrom saidblock, and means for forcing said head toward the last.

20. In a machinefor making lasts, the combination of a'base adapted tosupport a. last, gages for the heel, comb and side of the last, whichgages are adapted to occupy fixed iso l nai-ily position the toot-shapedcontour of g inseam positions relative to said base, clamping jaws, andmeans for moving said Ajaws against a last While positioned against saidgages, said jaws and means being so con-v structed as to permit saidjaws to automaticall y adji :t themselves to the last before being`clamped and to then cause them to be clamped.

2l. ln a tool for making lasts, he combii nation et' a clamp jaw7 andmeans for torcim; such jaw toward the object to he l clamped, said jawbeing automaticalliy adjustable t amstel-sel)Y to the direction 0Ipressure ot said means, substantially as and for the purpose described.

in a tool for making lasts, the combination of a clamp jaw and a headthat are i laterallux7 immovaloln With relation to the obt iec to beclamped, and a second clamp jaw nterposed 7oetifecn and laterallymovable with relation to id tirstementioned jaw and iidvhead, suchirst-ineniioned jan' and said i wad being capable of movement toward 1wh other to clamp them between such sec-- ond jaw, substantiall)Y andfor the purpose described.

23. In machine for making,r lasts, the combination of a hase, alast-supporting suri'ace on said hase` a tool supported in said machine7a heel gage adaoted to prelimithe last relative to said tool and liaisetand clamping means haring relatively niofableY members constructed toengage the last at a plurality of spaced points and automatically adjustthemselves to the shape and position of the last to permit the last toaccurately clamped to said hase after beingv positioned thereon.

2li. ln a machine t'or making lastsv` the combination ot' a heel rest, ahase, a 'tool supported in said machine, a lastsupporting surtace'onsaid base, a gage on said heel restadapted to preliniinarily positionthe tootshaped contour ot the last relative to said tool and base, andclamping means comprising an upper jar; constructed to engage a last ata pluralitf,v of' Aspaced points7 and a lower jaw, said iaa's beingmovable to adapt themselves to the shape of the last, and means toactuate ondefcf said jaus to clamp the last to the. base and against.the other jaw, after the last has hema positioned on said base. l

ln testimonyv that l claim the toregoing l have hereunto sety me* handthis 14th day of August, A. D. 1901.

EDXVIN J. RDLE.

v\\itnesses:

'HENRY C. HAZARD5 JAS. E. HUICHINSON.

